A new type of tetrapolymer was synthesized via the emulsion polymerization of acrylamide( AM) ,acrylic acid(AA) ,allyl sulfonate(SAS) ,and styrene(St)with(NH4)2S2O8-NaHSO3 as the redox initiator. The structure of the tetrapolymer was characterized by IR measurement,1H NMR and elemental analysis. The effecting issues on the apparent viscosity of the copolymer such as temperature,the content of monomer and initiator,and pH value were studied in detail to determine the optimum synthetic conditions. The anti-aging,heat resistance and salt tolerance were also investigated,and the results showed that the quaternary copolymer had a good tolerance to high salinity and high temperature. In addition,the core flow test indicated that the copolymer exhibited excellent an oil-displacing performance,and could be used as a polymer flooding agent for enhanced oil recovery.%本文采用乳液聚合方法,以丙烯酰胺、丙烯酸、烯丙基磺酸钠和苯乙烯作为单体,过硫酸铵-亚硫酸氢钠为氧化还原引发剂,合成了一种新型耐温耐盐的四元共聚物,并对其结构进行了红外、核磁共振及元素分析表征.考察了温度、单体浓度、体系pH和引发剂浓度等条件对聚合物表观粘度的影响,并确定了最佳的合成条件,同时对其抗老化、耐温及耐盐性能进行了评价.结果表明,该四元共聚物具有良好的耐温抗盐性能；另外,聚合物的岩心流动实验表明该四元共聚物具有较好的波及效率及出色的驱油效果,可以用作提高采收率的聚合物驱油剂.
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